When I click on the signature field, I don't see the 'change' and 'clear' dropdowns like the screen you showed. And only one signature is registered in her profile.
Hi @Okjung Gong !
If you can, try to send a new envelope to her using the exact combination (Name + Email). You can double-check her registered e-mail in her created signature to perform this text.
If still doesn’t work, I suggest she can two (or more) accounts created under the same e-mail address. If this is the scenario, only Customer Support can check and close those extra accounts.